Standardize usage of virtual/override/final in chrome/browser/task_manager/

chrome/browser/task_manager/panel_information.h

Index: chrome/browser/task_manager/panel_information.h
diff --git a/chrome/browser/task_manager/panel_information.h b/chrome/browser/task_manager/panel_information.h
index 91a1e7cb8b481fbb16ef82a4c1d5aaaf7966c1e7..c5b53249a58975dc3c524de5a07e1d698526d3f1 100644
--- a/chrome/browser/task_manager/panel_information.h
+++ b/chrome/browser/task_manager/panel_information.h
@@ -16,12 +16,12 @@ class PanelResource;
 class PanelInformation : public NotificationObservingWebContentsInformation {
  public:
   PanelInformation();
-  virtual ~PanelInformation();
+  ~PanelInformation() override;
 
   // WebContentsInformation implementation.
-  virtual bool CheckOwnership(content::WebContents* web_contents) override;
-  virtual void GetAll(const NewWebContentsCallback& callback) override;
-  virtual scoped_ptr<RendererResource> MakeResource(
+  bool CheckOwnership(content::WebContents* web_contents) override;
+  void GetAll(const NewWebContentsCallback& callback) override;
+  scoped_ptr<RendererResource> MakeResource(
       content::WebContents* web_contents) override;
 
  private: